Considering that your response relies heavily on deciding who is or isn't "demotist", it might help to address Yvain's criticism that the idea isn't a well-defined one. The issue of monarchs who claim to speak for the people is a serious one. Simply labeling dictators one doesn't like a demotist doesn't really do much. Similarly, your response also apparently ignores Yvain's discussion of the British monarchy.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.